21000391690

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{281}}^1\times {\mathrm{241079}}^1$

素因数の和:241398

約数の個数: 32

約数和(自身を含む): 39159106560

約数和(自身を除く): 18158714870

約数列:

[1, 2, 5, 10, 31, 62, 155, 281, 310, 562, 1405, 2810, 8711, 17422, 43555, 87110, 241079, 482158, 1205395, 2410790, 7473449, 14946898, 37367245, 67743199, 74734490, 135486398, 338715995, 677431990, 2100039169, 4200078338, 10500195845, 21000391690]

約数ペア:

[(1, 21000391690), (2, 10500195845), (5, 4200078338), (10, 2100039169), (31, 677431990), (62, 338715995), (155, 135486398), (281, 74734490), (310, 67743199), (562, 37367245), (1405, 14946898), (2810, 7473449), (8711, 2410790), (17422, 1205395), (43555, 482158), (87110, 241079)]