20917875

素因数分解:

$3^1\times 5^3\times {\mathrm{11}}^2\times {\mathrm{461}}^1$

素因数の和:501

約数の個数: 48

約数和(自身を含む): 38342304

約数和(自身を除く): 17424429

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 121, 125, 165, 275, 363, 375, 461, 605, 825, 1375, 1383, 1815, 2305, 3025, 4125, 5071, 6915, 9075, 11525, 15125, 15213, 25355, 34575, 45375, 55781, 57625, 76065, 126775, 167343, 172875, 278905, 380325, 633875, 836715, 1394525, 1901625, 4183575, 6972625, 20917875]

約数ペア:

[(1, 20917875), (3, 6972625), (5, 4183575), (11, 1901625), (15, 1394525), (25, 836715), (33, 633875), (55, 380325), (75, 278905), (121, 172875), (125, 167343), (165, 126775), (275, 76065), (363, 57625), (375, 55781), (461, 45375), (605, 34575), (825, 25355), (1375, 15213), (1383, 15125), (1815, 11525), (2305, 9075), (3025, 6915), (4125, 5071)]