28717520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{521}}^1$

素因数の和:600

約数の個数: 80

約数和(自身を含む): 73401552

約数和(自身を除く): 44684032

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 53, 65, 80, 104, 106, 130, 208, 212, 260, 265, 424, 520, 521, 530, 689, 848, 1040, 1042, 1060, 1378, 2084, 2120, 2605, 2756, 3445, 4168, 4240, 5210, 5512, 6773, 6890, 8336, 10420, 11024, 13546, 13780, 20840, 27092, 27560, 27613, 33865, 41680, 54184, 55120, 55226, 67730, 108368, 110452, 135460, 138065, 220904, 270920, 276130, 358969, 441808, 541840, 552260, 717938, 1104520, 1435876, 1794845, 2209040, 2871752, 3589690, 5743504, 7179380, 14358760, 28717520]

約数ペア:

[(1, 28717520), (2, 14358760), (4, 7179380), (5, 5743504), (8, 3589690), (10, 2871752), (13, 2209040), (16, 1794845), (20, 1435876), (26, 1104520), (40, 717938), (52, 552260), (53, 541840), (65, 441808), (80, 358969), (104, 276130), (106, 270920), (130, 220904), (208, 138065), (212, 135460), (260, 110452), (265, 108368), (424, 67730), (520, 55226), (521, 55120), (530, 54184), (689, 41680), (848, 33865), (1040, 27613), (1042, 27560), (1060, 27092), (1378, 20840), (2084, 13780), (2120, 13546), (2605, 11024), (2756, 10420), (3445, 8336), (4168, 6890), (4240, 6773), (5210, 5512)]