21420240

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{149}}^1\times {\mathrm{599}}^1$

素因数の和:764

約数の個数: 80

約数和(自身を含む): 66960000

約数和(自身を除く): 45539760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 149, 240, 298, 447, 596, 599, 745, 894, 1192, 1198, 1490, 1788, 1797, 2235, 2384, 2396, 2980, 2995, 3576, 3594, 4470, 4792, 5960, 5990, 7152, 7188, 8940, 8985, 9584, 11920, 11980, 14376, 17880, 17970, 23960, 28752, 35760, 35940, 47920, 71880, 89251, 143760, 178502, 267753, 357004, 446255, 535506, 714008, 892510, 1071012, 1338765, 1428016, 1785020, 2142024, 2677530, 3570040, 4284048, 5355060, 7140080, 10710120, 21420240]

約数ペア:

[(1, 21420240), (2, 10710120), (3, 7140080), (4, 5355060), (5, 4284048), (6, 3570040), (8, 2677530), (10, 2142024), (12, 1785020), (15, 1428016), (16, 1338765), (20, 1071012), (24, 892510), (30, 714008), (40, 535506), (48, 446255), (60, 357004), (80, 267753), (120, 178502), (149, 143760), (240, 89251), (298, 71880), (447, 47920), (596, 35940), (599, 35760), (745, 28752), (894, 23960), (1192, 17970), (1198, 17880), (1490, 14376), (1788, 11980), (1797, 11920), (2235, 9584), (2384, 8985), (2396, 8940), (2980, 7188), (2995, 7152), (3576, 5990), (3594, 5960), (4470, 4792)]