20997620735

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{521}}^1\times {\mathrm{877}}^1$

素因数の和:1524

約数の個数: 64

約数和(自身を含む): 31414811904

約数和(自身を除く): 10417191169

約数列:

[1, 5, 7, 13, 35, 65, 91, 101, 455, 505, 521, 707, 877, 1313, 2605, 3535, 3647, 4385, 6139, 6565, 6773, 9191, 11401, 18235, 30695, 33865, 45955, 47411, 52621, 57005, 79807, 88577, 237055, 263105, 368347, 399035, 442885, 456917, 620039, 684073, 1151501, 1841735, 2284585, 3100195, 3198419, 3420365, 4788511, 5757505, 5939921, 8060507, 15992095, 23942555, 29699605, 40302535, 41579447, 46148617, 207897235, 230743085, 323040319, 599932021, 1615201595, 2999660105, 4199524147, 20997620735]

約数ペア:

[(1, 20997620735), (5, 4199524147), (7, 2999660105), (13, 1615201595), (35, 599932021), (65, 323040319), (91, 230743085), (101, 207897235), (455, 46148617), (505, 41579447), (521, 40302535), (707, 29699605), (877, 23942555), (1313, 15992095), (2605, 8060507), (3535, 5939921), (3647, 5757505), (4385, 4788511), (6139, 3420365), (6565, 3198419), (6773, 3100195), (9191, 2284585), (11401, 1841735), (18235, 1151501), (30695, 684073), (33865, 620039), (45955, 456917), (47411, 442885), (52621, 399035), (57005, 368347), (79807, 263105), (88577, 237055)]