28928560

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{239}}^1$

素因数の和:358

約数の個数: 80

約数和(自身を含む): 72316800

約数和(自身を除く): 43388240

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 89, 136, 170, 178, 239, 272, 340, 356, 445, 478, 680, 712, 890, 956, 1195, 1360, 1424, 1513, 1780, 1912, 2390, 3026, 3560, 3824, 4063, 4780, 6052, 7120, 7565, 8126, 9560, 12104, 15130, 16252, 19120, 20315, 21271, 24208, 30260, 32504, 40630, 42542, 60520, 65008, 81260, 85084, 106355, 121040, 162520, 170168, 212710, 325040, 340336, 361607, 425420, 723214, 850840, 1446428, 1701680, 1808035, 2892856, 3616070, 5785712, 7232140, 14464280, 28928560]

約数ペア:

[(1, 28928560), (2, 14464280), (4, 7232140), (5, 5785712), (8, 3616070), (10, 2892856), (16, 1808035), (17, 1701680), (20, 1446428), (34, 850840), (40, 723214), (68, 425420), (80, 361607), (85, 340336), (89, 325040), (136, 212710), (170, 170168), (178, 162520), (239, 121040), (272, 106355), (340, 85084), (356, 81260), (445, 65008), (478, 60520), (680, 42542), (712, 40630), (890, 32504), (956, 30260), (1195, 24208), (1360, 21271), (1424, 20315), (1513, 19120), (1780, 16252), (1912, 15130), (2390, 12104), (3026, 9560), (3560, 8126), (3824, 7565), (4063, 7120), (4780, 6052)]