21409220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4933}}^1$

素因数の和:4980

約数の個数: 48

約数和(自身を含む): 53050368

約数和(自身を除く): 31641148

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4933, 9866, 19732, 24665, 34531, 49330, 69062, 98660, 138124, 152923, 172655, 305846, 345310, 611692, 690620, 764615, 1070461, 1529230, 2140922, 3058460, 4281844, 5352305, 10704610, 21409220]

約数ペア:

[(1, 21409220), (2, 10704610), (4, 5352305), (5, 4281844), (7, 3058460), (10, 2140922), (14, 1529230), (20, 1070461), (28, 764615), (31, 690620), (35, 611692), (62, 345310), (70, 305846), (124, 172655), (140, 152923), (155, 138124), (217, 98660), (310, 69062), (434, 49330), (620, 34531), (868, 24665), (1085, 19732), (2170, 9866), (4340, 4933)]