20717300

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:249

約数の個数: 72

約数和(自身を含む): 47830272

約数和(自身を除く): 27112972

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 41, 50, 62, 82, 100, 124, 155, 163, 164, 205, 310, 326, 410, 620, 652, 775, 815, 820, 1025, 1271, 1550, 1630, 2050, 2542, 3100, 3260, 4075, 4100, 5053, 5084, 6355, 6683, 8150, 10106, 12710, 13366, 16300, 20212, 25265, 25420, 26732, 31775, 33415, 50530, 63550, 66830, 101060, 126325, 127100, 133660, 167075, 207173, 252650, 334150, 414346, 505300, 668300, 828692, 1035865, 2071730, 4143460, 5179325, 10358650, 20717300]

約数ペア:

[(1, 20717300), (2, 10358650), (4, 5179325), (5, 4143460), (10, 2071730), (20, 1035865), (25, 828692), (31, 668300), (41, 505300), (50, 414346), (62, 334150), (82, 252650), (100, 207173), (124, 167075), (155, 133660), (163, 127100), (164, 126325), (205, 101060), (310, 66830), (326, 63550), (410, 50530), (620, 33415), (652, 31775), (775, 26732), (815, 25420), (820, 25265), (1025, 20212), (1271, 16300), (1550, 13366), (1630, 12710), (2050, 10106), (2542, 8150), (3100, 6683), (3260, 6355), (4075, 5084), (4100, 5053)]