21146020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{1153}}^1$

素因数の和:1300

約数の個数: 48

約数和(自身を含む): 51182208

約数和(自身を除く): 30036188

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 131, 140, 262, 524, 655, 917, 1153, 1310, 1834, 2306, 2620, 3668, 4585, 4612, 5765, 8071, 9170, 11530, 16142, 18340, 23060, 32284, 40355, 80710, 151043, 161420, 302086, 604172, 755215, 1057301, 1510430, 2114602, 3020860, 4229204, 5286505, 10573010, 21146020]

約数ペア:

[(1, 21146020), (2, 10573010), (4, 5286505), (5, 4229204), (7, 3020860), (10, 2114602), (14, 1510430), (20, 1057301), (28, 755215), (35, 604172), (70, 302086), (131, 161420), (140, 151043), (262, 80710), (524, 40355), (655, 32284), (917, 23060), (1153, 18340), (1310, 16142), (1834, 11530), (2306, 9170), (2620, 8071), (3668, 5765), (4585, 4612)]