21370291280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{555361}}^1$

素因数の和:555424

約数の個数: 80

約数和(自身を含む): 54954180624

約数和(自身を除く): 33583889344

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 37, 40, 52, 65, 74, 80, 104, 130, 148, 185, 208, 260, 296, 370, 481, 520, 592, 740, 962, 1040, 1480, 1924, 2405, 2960, 3848, 4810, 7696, 9620, 19240, 38480, 555361, 1110722, 2221444, 2776805, 4442888, 5553610, 7219693, 8885776, 11107220, 14439386, 20548357, 22214440, 28878772, 36098465, 41096714, 44428880, 57757544, 72196930, 82193428, 102741785, 115515088, 144393860, 164386856, 205483570, 267128641, 288787720, 328773712, 410967140, 534257282, 577575440, 821934280, 1068514564, 1335643205, 1643868560, 2137029128, 2671286410, 4274058256, 5342572820, 10685145640, 21370291280]

約数ペア:

[(1, 21370291280), (2, 10685145640), (4, 5342572820), (5, 4274058256), (8, 2671286410), (10, 2137029128), (13, 1643868560), (16, 1335643205), (20, 1068514564), (26, 821934280), (37, 577575440), (40, 534257282), (52, 410967140), (65, 328773712), (74, 288787720), (80, 267128641), (104, 205483570), (130, 164386856), (148, 144393860), (185, 115515088), (208, 102741785), (260, 82193428), (296, 72196930), (370, 57757544), (481, 44428880), (520, 41096714), (592, 36098465), (740, 28878772), (962, 22214440), (1040, 20548357), (1480, 14439386), (1924, 11107220), (2405, 8885776), (2960, 7219693), (3848, 5553610), (4810, 4442888), (7696, 2776805), (9620, 2221444), (19240, 1110722), (38480, 555361)]