20996625

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1$

素因数の和:163

約数の個数: 64

約数和(自身を含む): 38787840

約数和(自身を除く): 17791215

約数列:

[1, 3, 5, 13, 15, 25, 39, 59, 65, 73, 75, 125, 177, 195, 219, 295, 325, 365, 375, 767, 885, 949, 975, 1095, 1475, 1625, 1825, 2301, 2847, 3835, 4307, 4425, 4745, 4875, 5475, 7375, 9125, 11505, 12921, 14235, 19175, 21535, 22125, 23725, 27375, 55991, 57525, 64605, 71175, 95875, 107675, 118625, 167973, 279955, 287625, 323025, 355875, 538375, 839865, 1399775, 1615125, 4199325, 6998875, 20996625]

約数ペア:

[(1, 20996625), (3, 6998875), (5, 4199325), (13, 1615125), (15, 1399775), (25, 839865), (39, 538375), (59, 355875), (65, 323025), (73, 287625), (75, 279955), (125, 167973), (177, 118625), (195, 107675), (219, 95875), (295, 71175), (325, 64605), (365, 57525), (375, 55991), (767, 27375), (885, 23725), (949, 22125), (975, 21535), (1095, 19175), (1475, 14235), (1625, 12921), (1825, 11505), (2301, 9125), (2847, 7375), (3835, 5475), (4307, 4875), (4425, 4745)]