21545325

素因数分解:

$3^3\times 5^2\times {\mathrm{59}}^1\times {\mathrm{541}}^1$

素因数の和:619

約数の個数: 48

約数和(自身を含む): 40324800

約数和(自身を除く): 18779475

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 59, 75, 135, 177, 225, 295, 531, 541, 675, 885, 1475, 1593, 1623, 2655, 2705, 4425, 4869, 7965, 8115, 13275, 13525, 14607, 24345, 31919, 39825, 40575, 73035, 95757, 121725, 159595, 287271, 365175, 478785, 797975, 861813, 1436355, 2393925, 4309065, 7181775, 21545325]

約数ペア:

[(1, 21545325), (3, 7181775), (5, 4309065), (9, 2393925), (15, 1436355), (25, 861813), (27, 797975), (45, 478785), (59, 365175), (75, 287271), (135, 159595), (177, 121725), (225, 95757), (295, 73035), (531, 40575), (541, 39825), (675, 31919), (885, 24345), (1475, 14607), (1593, 13525), (1623, 13275), (2655, 8115), (2705, 7965), (4425, 4869)]