1639900

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^2\times {\mathrm{31}}^1$

素因数の和:91

約数の個数: 54

約数和(自身を含む): 3840032

約数和(自身を除く): 2200132

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 31, 46, 50, 62, 92, 100, 115, 124, 155, 230, 310, 460, 529, 575, 620, 713, 775, 1058, 1150, 1426, 1550, 2116, 2300, 2645, 2852, 3100, 3565, 5290, 7130, 10580, 13225, 14260, 16399, 17825, 26450, 32798, 35650, 52900, 65596, 71300, 81995, 163990, 327980, 409975, 819950, 1639900]

約数ペア:

[(1, 1639900), (2, 819950), (4, 409975), (5, 327980), (10, 163990), (20, 81995), (23, 71300), (25, 65596), (31, 52900), (46, 35650), (50, 32798), (62, 26450), (92, 17825), (100, 16399), (115, 14260), (124, 13225), (155, 10580), (230, 7130), (310, 5290), (460, 3565), (529, 3100), (575, 2852), (620, 2645), (713, 2300), (775, 2116), (1058, 1550), (1150, 1426)]