21000918070

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{173}}^1\times {\mathrm{367}}^1$

素因数の和:686

約数の個数: 128

約数和(自身を含む): 43373740032

約数和(自身を除く): 22372821962

約数列:

[1, 2, 5, 10, 11, 22, 31, 55, 62, 97, 110, 155, 173, 194, 310, 341, 346, 367, 485, 682, 734, 865, 970, 1067, 1705, 1730, 1835, 1903, 2134, 3007, 3410, 3670, 3806, 4037, 5335, 5363, 6014, 8074, 9515, 10670, 10726, 11377, 15035, 16781, 19030, 20185, 22754, 26815, 30070, 33077, 33562, 35599, 40370, 53630, 56885, 58993, 63491, 66154, 71198, 83905, 113770, 117986, 125147, 126982, 165385, 167810, 177995, 184591, 250294, 294965, 317455, 330770, 355990, 369182, 391589, 520211, 589930, 625735, 634910, 698401, 783178, 922955, 1040422, 1103569, 1251470, 1396802, 1845910, 1957945, 1968221, 2207138, 2601055, 3492005, 3915890, 3936442, 5202110, 5517845, 5722321, 6158627, 6984010, 9841105, 11035690, 11444642, 12139259, 12317254, 19682210, 21650431, 24278518, 28611605, 30793135, 43300862, 57223210, 60696295, 61586270, 67744897, 108252155, 121392590, 135489794, 190917437, 216504310, 338724485, 381834874, 677448970, 954587185, 1909174370, 2100091807, 4200183614, 10500459035, 21000918070]

約数ペア:

[(1, 21000918070), (2, 10500459035), (5, 4200183614), (10, 2100091807), (11, 1909174370), (22, 954587185), (31, 677448970), (55, 381834874), (62, 338724485), (97, 216504310), (110, 190917437), (155, 135489794), (173, 121392590), (194, 108252155), (310, 67744897), (341, 61586270), (346, 60696295), (367, 57223210), (485, 43300862), (682, 30793135), (734, 28611605), (865, 24278518), (970, 21650431), (1067, 19682210), (1705, 12317254), (1730, 12139259), (1835, 11444642), (1903, 11035690), (2134, 9841105), (3007, 6984010), (3410, 6158627), (3670, 5722321), (3806, 5517845), (4037, 5202110), (5335, 3936442), (5363, 3915890), (6014, 3492005), (8074, 2601055), (9515, 2207138), (10670, 1968221), (10726, 1957945), (11377, 1845910), (15035, 1396802), (16781, 1251470), (19030, 1103569), (20185, 1040422), (22754, 922955), (26815, 783178), (30070, 698401), (33077, 634910), (33562, 625735), (35599, 589930), (40370, 520211), (53630, 391589), (56885, 369182), (58993, 355990), (63491, 330770), (66154, 317455), (71198, 294965), (83905, 250294), (113770, 184591), (117986, 177995), (125147, 167810), (126982, 165385)]