20345640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{457}}^1$

素因数の和:531

約数の個数: 128

約数和(自身を含む): 71228160

約数和(自身を除く): 50882520

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 53, 56, 60, 70, 84, 105, 106, 120, 140, 159, 168, 210, 212, 265, 280, 318, 371, 420, 424, 457, 530, 636, 742, 795, 840, 914, 1060, 1113, 1272, 1371, 1484, 1590, 1828, 1855, 2120, 2226, 2285, 2742, 2968, 3180, 3199, 3656, 3710, 4452, 4570, 5484, 5565, 6360, 6398, 6855, 7420, 8904, 9140, 9597, 10968, 11130, 12796, 13710, 14840, 15995, 18280, 19194, 22260, 24221, 25592, 27420, 31990, 38388, 44520, 47985, 48442, 54840, 63980, 72663, 76776, 95970, 96884, 121105, 127960, 145326, 169547, 191940, 193768, 242210, 290652, 339094, 363315, 383880, 484420, 508641, 581304, 678188, 726630, 847735, 968840, 1017282, 1356376, 1453260, 1695470, 2034564, 2543205, 2906520, 3390940, 4069128, 5086410, 6781880, 10172820, 20345640]

約数ペア:

[(1, 20345640), (2, 10172820), (3, 6781880), (4, 5086410), (5, 4069128), (6, 3390940), (7, 2906520), (8, 2543205), (10, 2034564), (12, 1695470), (14, 1453260), (15, 1356376), (20, 1017282), (21, 968840), (24, 847735), (28, 726630), (30, 678188), (35, 581304), (40, 508641), (42, 484420), (53, 383880), (56, 363315), (60, 339094), (70, 290652), (84, 242210), (105, 193768), (106, 191940), (120, 169547), (140, 145326), (159, 127960), (168, 121105), (210, 96884), (212, 95970), (265, 76776), (280, 72663), (318, 63980), (371, 54840), (420, 48442), (424, 47985), (457, 44520), (530, 38388), (636, 31990), (742, 27420), (795, 25592), (840, 24221), (914, 22260), (1060, 19194), (1113, 18280), (1272, 15995), (1371, 14840), (1484, 13710), (1590, 12796), (1828, 11130), (1855, 10968), (2120, 9597), (2226, 9140), (2285, 8904), (2742, 7420), (2968, 6855), (3180, 6398), (3199, 6360), (3656, 5565), (3710, 5484), (4452, 4570)]