18941620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{223}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 41545728

約数和(自身を除く): 22604108

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 137, 155, 223, 274, 310, 446, 548, 620, 685, 892, 1115, 1370, 2230, 2740, 4247, 4460, 6913, 8494, 13826, 16988, 21235, 27652, 30551, 34565, 42470, 61102, 69130, 84940, 122204, 138260, 152755, 305510, 611020, 947081, 1894162, 3788324, 4735405, 9470810, 18941620]

約数ペア:

[(1, 18941620), (2, 9470810), (4, 4735405), (5, 3788324), (10, 1894162), (20, 947081), (31, 611020), (62, 305510), (124, 152755), (137, 138260), (155, 122204), (223, 84940), (274, 69130), (310, 61102), (446, 42470), (548, 34565), (620, 30551), (685, 27652), (892, 21235), (1115, 16988), (1370, 13826), (2230, 8494), (2740, 6913), (4247, 4460)]