21301785

素因数分解:

$3^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{353}}^1$

素因数の和:519

約数の個数: 40

約数和(自身を含む): 38550600

約数和(自身を除く): 17248815

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 149, 353, 405, 447, 745, 1059, 1341, 1765, 2235, 3177, 4023, 5295, 6705, 9531, 12069, 15885, 20115, 28593, 47655, 52597, 60345, 142965, 157791, 262985, 473373, 788955, 1420119, 2366865, 4260357, 7100595, 21301785]

約数ペア:

[(1, 21301785), (3, 7100595), (5, 4260357), (9, 2366865), (15, 1420119), (27, 788955), (45, 473373), (81, 262985), (135, 157791), (149, 142965), (353, 60345), (405, 52597), (447, 47655), (745, 28593), (1059, 20115), (1341, 15885), (1765, 12069), (2235, 9531), (3177, 6705), (4023, 5295)]