20458450

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{197}}^1$

素因数の和:307

約数の個数: 48

約数和(自身を含む): 40068864

約数和(自身を除く): 19610414

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 67, 134, 155, 197, 310, 335, 394, 670, 775, 985, 1550, 1675, 1970, 2077, 3350, 4154, 4925, 6107, 9850, 10385, 12214, 13199, 20770, 26398, 30535, 51925, 61070, 65995, 103850, 131990, 152675, 305350, 329975, 409169, 659950, 818338, 2045845, 4091690, 10229225, 20458450]

約数ペア:

[(1, 20458450), (2, 10229225), (5, 4091690), (10, 2045845), (25, 818338), (31, 659950), (50, 409169), (62, 329975), (67, 305350), (134, 152675), (155, 131990), (197, 103850), (310, 65995), (335, 61070), (394, 51925), (670, 30535), (775, 26398), (985, 20770), (1550, 13199), (1675, 12214), (1970, 10385), (2077, 9850), (3350, 6107), (4154, 4925)]