21139210

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1$

素因数の和:191

約数の個数: 64

約数和(自身を含む): 42900480

約数和(自身を除く): 21761270

約数列:

[1, 2, 5, 10, 19, 31, 37, 38, 62, 74, 95, 97, 155, 185, 190, 194, 310, 370, 485, 589, 703, 970, 1147, 1178, 1406, 1843, 2294, 2945, 3007, 3515, 3589, 3686, 5735, 5890, 6014, 7030, 7178, 9215, 11470, 15035, 17945, 18430, 21793, 30070, 35890, 43586, 57133, 68191, 108965, 111259, 114266, 136382, 217930, 222518, 285665, 340955, 556295, 571330, 681910, 1112590, 2113921, 4227842, 10569605, 21139210]

約数ペア:

[(1, 21139210), (2, 10569605), (5, 4227842), (10, 2113921), (19, 1112590), (31, 681910), (37, 571330), (38, 556295), (62, 340955), (74, 285665), (95, 222518), (97, 217930), (155, 136382), (185, 114266), (190, 111259), (194, 108965), (310, 68191), (370, 57133), (485, 43586), (589, 35890), (703, 30070), (970, 21793), (1147, 18430), (1178, 17945), (1406, 15035), (1843, 11470), (2294, 9215), (2945, 7178), (3007, 7030), (3515, 6014), (3589, 5890), (3686, 5735)]