20999130

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{281}}^1$

素因数の和:391

約数の個数: 64

約数和(自身を含む): 52627968

約数和(自身を除く): 31628838

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 47, 53, 94, 106, 141, 159, 235, 265, 281, 282, 318, 470, 530, 562, 705, 795, 843, 1405, 1410, 1590, 1686, 2491, 2810, 4215, 4982, 7473, 8430, 12455, 13207, 14893, 14946, 24910, 26414, 29786, 37365, 39621, 44679, 66035, 74465, 74730, 79242, 89358, 132070, 148930, 198105, 223395, 396210, 446790, 699971, 1399942, 2099913, 3499855, 4199826, 6999710, 10499565, 20999130]

約数ペア:

[(1, 20999130), (2, 10499565), (3, 6999710), (5, 4199826), (6, 3499855), (10, 2099913), (15, 1399942), (30, 699971), (47, 446790), (53, 396210), (94, 223395), (106, 198105), (141, 148930), (159, 132070), (235, 89358), (265, 79242), (281, 74730), (282, 74465), (318, 66035), (470, 44679), (530, 39621), (562, 37365), (705, 29786), (795, 26414), (843, 24910), (1405, 14946), (1410, 14893), (1590, 13207), (1686, 12455), (2491, 8430), (2810, 7473), (4215, 4982)]