20915460

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{887}}^1$

素因数の和:1033

約数の個数: 72

約数和(自身を含む): 63999936

約数和(自身を除く): 43084476

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 131, 180, 262, 393, 524, 655, 786, 887, 1179, 1310, 1572, 1774, 1965, 2358, 2620, 2661, 3548, 3930, 4435, 4716, 5322, 5895, 7860, 7983, 8870, 10644, 11790, 13305, 15966, 17740, 23580, 26610, 31932, 39915, 53220, 79830, 116197, 159660, 232394, 348591, 464788, 580985, 697182, 1045773, 1161970, 1394364, 1742955, 2091546, 2323940, 3485910, 4183092, 5228865, 6971820, 10457730, 20915460]

約数ペア:

[(1, 20915460), (2, 10457730), (3, 6971820), (4, 5228865), (5, 4183092), (6, 3485910), (9, 2323940), (10, 2091546), (12, 1742955), (15, 1394364), (18, 1161970), (20, 1045773), (30, 697182), (36, 580985), (45, 464788), (60, 348591), (90, 232394), (131, 159660), (180, 116197), (262, 79830), (393, 53220), (524, 39915), (655, 31932), (786, 26610), (887, 23580), (1179, 17740), (1310, 15966), (1572, 13305), (1774, 11790), (1965, 10644), (2358, 8870), (2620, 7983), (2661, 7860), (3548, 5895), (3930, 5322), (4435, 4716)]