20885625

素因数分解:

$3^2\times 5^4\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:152

約数の個数: 60

約数和(自身を含む): 38987520

約数和(自身を除く): 18101895

約数列:

[1, 3, 5, 9, 15, 25, 45, 47, 75, 79, 125, 141, 225, 235, 237, 375, 395, 423, 625, 705, 711, 1125, 1175, 1185, 1875, 1975, 2115, 3525, 3555, 3713, 5625, 5875, 5925, 9875, 10575, 11139, 17625, 17775, 18565, 29375, 29625, 33417, 49375, 52875, 55695, 88125, 88875, 92825, 148125, 167085, 264375, 278475, 444375, 464125, 835425, 1392375, 2320625, 4177125, 6961875, 20885625]

約数ペア:

[(1, 20885625), (3, 6961875), (5, 4177125), (9, 2320625), (15, 1392375), (25, 835425), (45, 464125), (47, 444375), (75, 278475), (79, 264375), (125, 167085), (141, 148125), (225, 92825), (235, 88875), (237, 88125), (375, 55695), (395, 52875), (423, 49375), (625, 33417), (705, 29625), (711, 29375), (1125, 18565), (1175, 17775), (1185, 17625), (1875, 11139), (1975, 10575), (2115, 9875), (3525, 5925), (3555, 5875), (3713, 5625)]