20493375

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{211}}^1$

素因数の和:273

約数の個数: 64

約数和(自身を含む): 40215552

約数和(自身を除く): 19722177

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 37, 75, 105, 111, 125, 175, 185, 211, 259, 375, 525, 555, 633, 777, 875, 925, 1055, 1295, 1477, 2625, 2775, 3165, 3885, 4431, 4625, 5275, 6475, 7385, 7807, 13875, 15825, 19425, 22155, 23421, 26375, 32375, 36925, 39035, 54649, 79125, 97125, 110775, 117105, 163947, 184625, 195175, 273245, 553875, 585525, 819735, 975875, 1366225, 2927625, 4098675, 6831125, 20493375]

約数ペア:

[(1, 20493375), (3, 6831125), (5, 4098675), (7, 2927625), (15, 1366225), (21, 975875), (25, 819735), (35, 585525), (37, 553875), (75, 273245), (105, 195175), (111, 184625), (125, 163947), (175, 117105), (185, 110775), (211, 97125), (259, 79125), (375, 54649), (525, 39035), (555, 36925), (633, 32375), (777, 26375), (875, 23421), (925, 22155), (1055, 19425), (1295, 15825), (1477, 13875), (2625, 7807), (2775, 7385), (3165, 6475), (3885, 5275), (4431, 4625)]