20698125

素因数分解:

$3^1\times 5^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:132

約数の個数: 80

約数和(自身を含む): 41986560

約数和(自身を除く): 21288435

約数列:

[1, 3, 5, 7, 15, 19, 21, 25, 35, 57, 75, 83, 95, 105, 125, 133, 175, 249, 285, 375, 399, 415, 475, 525, 581, 625, 665, 875, 1245, 1425, 1577, 1743, 1875, 1995, 2075, 2375, 2625, 2905, 3325, 4375, 4731, 6225, 7125, 7885, 8715, 9975, 10375, 11039, 11875, 13125, 14525, 16625, 23655, 31125, 33117, 35625, 39425, 43575, 49875, 51875, 55195, 72625, 83125, 118275, 155625, 165585, 197125, 217875, 249375, 275975, 363125, 591375, 827925, 985625, 1089375, 1379875, 2956875, 4139625, 6899375, 20698125]

約数ペア:

[(1, 20698125), (3, 6899375), (5, 4139625), (7, 2956875), (15, 1379875), (19, 1089375), (21, 985625), (25, 827925), (35, 591375), (57, 363125), (75, 275975), (83, 249375), (95, 217875), (105, 197125), (125, 165585), (133, 155625), (175, 118275), (249, 83125), (285, 72625), (375, 55195), (399, 51875), (415, 49875), (475, 43575), (525, 39425), (581, 35625), (625, 33117), (665, 31125), (875, 23655), (1245, 16625), (1425, 14525), (1577, 13125), (1743, 11875), (1875, 11039), (1995, 10375), (2075, 9975), (2375, 8715), (2625, 7885), (2905, 7125), (3325, 6225), (4375, 4731)]