21599860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{101}}^1$

素因数の和:181

約数の個数: 72

約数和(自身を含む): 49977144

約数和(自身を除く): 28377284

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 37, 68, 74, 85, 101, 148, 170, 185, 202, 289, 340, 370, 404, 505, 578, 629, 740, 1010, 1156, 1258, 1445, 1717, 2020, 2516, 2890, 3145, 3434, 3737, 5780, 6290, 6868, 7474, 8585, 10693, 12580, 14948, 17170, 18685, 21386, 29189, 34340, 37370, 42772, 53465, 58378, 63529, 74740, 106930, 116756, 127058, 145945, 213860, 254116, 291890, 317645, 583780, 635290, 1079993, 1270580, 2159986, 4319972, 5399965, 10799930, 21599860]

約数ペア:

[(1, 21599860), (2, 10799930), (4, 5399965), (5, 4319972), (10, 2159986), (17, 1270580), (20, 1079993), (34, 635290), (37, 583780), (68, 317645), (74, 291890), (85, 254116), (101, 213860), (148, 145945), (170, 127058), (185, 116756), (202, 106930), (289, 74740), (340, 63529), (370, 58378), (404, 53465), (505, 42772), (578, 37370), (629, 34340), (740, 29189), (1010, 21386), (1156, 18685), (1258, 17170), (1445, 14948), (1717, 12580), (2020, 10693), (2516, 8585), (2890, 7474), (3145, 6868), (3434, 6290), (3737, 5780)]