21991710

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1$

素因数の和:178

約数の個数: 128

約数和(自身を含む): 62705664

約数和(自身を除く): 40713954

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 17, 26, 30, 31, 34, 39, 51, 62, 65, 78, 85, 93, 102, 107, 130, 155, 170, 186, 195, 214, 221, 255, 310, 321, 390, 403, 442, 465, 510, 527, 535, 642, 663, 806, 930, 1054, 1070, 1105, 1209, 1326, 1391, 1581, 1605, 1819, 2015, 2210, 2418, 2635, 2782, 3162, 3210, 3315, 3317, 3638, 4030, 4173, 5270, 5457, 6045, 6630, 6634, 6851, 6955, 7905, 8346, 9095, 9951, 10914, 12090, 13702, 13910, 15810, 16585, 18190, 19902, 20553, 20865, 23647, 27285, 33170, 34255, 41106, 41730, 43121, 47294, 49755, 54570, 56389, 68510, 70941, 86242, 99510, 102765, 112778, 118235, 129363, 141882, 169167, 205530, 215605, 236470, 258726, 281945, 338334, 354705, 431210, 563890, 646815, 709410, 733057, 845835, 1293630, 1466114, 1691670, 2199171, 3665285, 4398342, 7330570, 10995855, 21991710]

約数ペア:

[(1, 21991710), (2, 10995855), (3, 7330570), (5, 4398342), (6, 3665285), (10, 2199171), (13, 1691670), (15, 1466114), (17, 1293630), (26, 845835), (30, 733057), (31, 709410), (34, 646815), (39, 563890), (51, 431210), (62, 354705), (65, 338334), (78, 281945), (85, 258726), (93, 236470), (102, 215605), (107, 205530), (130, 169167), (155, 141882), (170, 129363), (186, 118235), (195, 112778), (214, 102765), (221, 99510), (255, 86242), (310, 70941), (321, 68510), (390, 56389), (403, 54570), (442, 49755), (465, 47294), (510, 43121), (527, 41730), (535, 41106), (642, 34255), (663, 33170), (806, 27285), (930, 23647), (1054, 20865), (1070, 20553), (1105, 19902), (1209, 18190), (1326, 16585), (1391, 15810), (1581, 13910), (1605, 13702), (1819, 12090), (2015, 10914), (2210, 9951), (2418, 9095), (2635, 8346), (2782, 7905), (3162, 6955), (3210, 6851), (3315, 6634), (3317, 6630), (3638, 6045), (4030, 5457), (4173, 5270)]