28503140

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{239}}^1$

素因数の和:404

約数の個数: 48

約数和(自身を含む): 61689600

約数和(自身を除く): 33186460

約数列:

[1, 2, 4, 5, 10, 20, 67, 89, 134, 178, 239, 268, 335, 356, 445, 478, 670, 890, 956, 1195, 1340, 1780, 2390, 4780, 5963, 11926, 16013, 21271, 23852, 29815, 32026, 42542, 59630, 64052, 80065, 85084, 106355, 119260, 160130, 212710, 320260, 425420, 1425157, 2850314, 5700628, 7125785, 14251570, 28503140]

約数ペア:

[(1, 28503140), (2, 14251570), (4, 7125785), (5, 5700628), (10, 2850314), (20, 1425157), (67, 425420), (89, 320260), (134, 212710), (178, 160130), (239, 119260), (268, 106355), (335, 85084), (356, 80065), (445, 64052), (478, 59630), (670, 42542), (890, 32026), (956, 29815), (1195, 23852), (1340, 21271), (1780, 16013), (2390, 11926), (4780, 5963)]