209974375

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{601}}^1$

素因数の和:677

約数の個数: 40

約数和(自身を含む): 289619792

約数和(自身を除く): 79645417

約数列:

[1, 5, 13, 25, 43, 65, 125, 215, 325, 559, 601, 625, 1075, 1625, 2795, 3005, 5375, 7813, 8125, 13975, 15025, 25843, 26875, 39065, 69875, 75125, 129215, 195325, 335959, 349375, 375625, 646075, 976625, 1679795, 3230375, 4883125, 8398975, 16151875, 41994875, 209974375]

約数ペア:

[(1, 209974375), (5, 41994875), (13, 16151875), (25, 8398975), (43, 4883125), (65, 3230375), (125, 1679795), (215, 976625), (325, 646075), (559, 375625), (601, 349375), (625, 335959), (1075, 195325), (1625, 129215), (2795, 75125), (3005, 69875), (5375, 39065), (7813, 26875), (8125, 25843), (13975, 15025)]