21405380

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{401}}^1$

素因数の和:584

約数の個数: 48

約数和(自身を含む): 48018096

約数和(自身を除く): 26612716

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 157, 170, 314, 340, 401, 628, 785, 802, 1570, 1604, 2005, 2669, 3140, 4010, 5338, 6817, 8020, 10676, 13345, 13634, 26690, 27268, 34085, 53380, 62957, 68170, 125914, 136340, 251828, 314785, 629570, 1070269, 1259140, 2140538, 4281076, 5351345, 10702690, 21405380]

約数ペア:

[(1, 21405380), (2, 10702690), (4, 5351345), (5, 4281076), (10, 2140538), (17, 1259140), (20, 1070269), (34, 629570), (68, 314785), (85, 251828), (157, 136340), (170, 125914), (314, 68170), (340, 62957), (401, 53380), (628, 34085), (785, 27268), (802, 26690), (1570, 13634), (1604, 13345), (2005, 10676), (2669, 8020), (3140, 6817), (4010, 5338)]