20972525

素因数分解:

$5^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:174

約数の個数: 48

約数和(自身を含む): 31664640

約数和(自身を除く): 10692115

約数列:

[1, 5, 7, 25, 35, 37, 41, 79, 175, 185, 205, 259, 287, 395, 553, 925, 1025, 1295, 1435, 1517, 1975, 2765, 2923, 3239, 6475, 7175, 7585, 10619, 13825, 14615, 16195, 20461, 22673, 37925, 53095, 73075, 80975, 102305, 113365, 119843, 265475, 511525, 566825, 599215, 838901, 2996075, 4194505, 20972525]

約数ペア:

[(1, 20972525), (5, 4194505), (7, 2996075), (25, 838901), (35, 599215), (37, 566825), (41, 511525), (79, 265475), (175, 119843), (185, 113365), (205, 102305), (259, 80975), (287, 73075), (395, 53095), (553, 37925), (925, 22673), (1025, 20461), (1295, 16195), (1435, 14615), (1517, 13825), (1975, 10619), (2765, 7585), (2923, 7175), (3239, 6475)]