21173840

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15569}}^1$

素因数の和:15599

約数の個数: 40

約数和(自身を含む): 52128360

約数和(自身を除く): 30954520

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15569, 31138, 62276, 77845, 124552, 155690, 249104, 264673, 311380, 529346, 622760, 1058692, 1245520, 1323365, 2117384, 2646730, 4234768, 5293460, 10586920, 21173840]

約数ペア:

[(1, 21173840), (2, 10586920), (4, 5293460), (5, 4234768), (8, 2646730), (10, 2117384), (16, 1323365), (17, 1245520), (20, 1058692), (34, 622760), (40, 529346), (68, 311380), (80, 264673), (85, 249104), (136, 155690), (170, 124552), (272, 77845), (340, 62276), (680, 31138), (1360, 15569)]