1021420625

素因数分解:

$5^4\times {\mathrm{79}}^1\times {\mathrm{137}}^1\times {\mathrm{151}}^1$

素因数の和:387

約数の個数: 40

約数和(自身を含む): 1310580480

約数和(自身を除く): 289159855

約数列:

[1, 5, 25, 79, 125, 137, 151, 395, 625, 685, 755, 1975, 3425, 3775, 9875, 10823, 11929, 17125, 18875, 20687, 49375, 54115, 59645, 85625, 94375, 103435, 270575, 298225, 517175, 1352875, 1491125, 1634273, 2585875, 6764375, 7455625, 8171365, 12929375, 40856825, 204284125, 1021420625]

約数ペア:

[(1, 1021420625), (5, 204284125), (25, 40856825), (79, 12929375), (125, 8171365), (137, 7455625), (151, 6764375), (395, 2585875), (625, 1634273), (685, 1491125), (755, 1352875), (1975, 517175), (3425, 298225), (3775, 270575), (9875, 103435), (10823, 94375), (11929, 85625), (17125, 59645), (18875, 54115), (20687, 49375)]