20925580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{151}}^1$

素因数の和:227

約数の個数: 72

約数和(自身を含む): 49067424

約数和(自身を除く): 28141844

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 41, 52, 65, 82, 130, 151, 164, 169, 205, 260, 302, 338, 410, 533, 604, 676, 755, 820, 845, 1066, 1510, 1690, 1963, 2132, 2665, 3020, 3380, 3926, 5330, 6191, 6929, 7852, 9815, 10660, 12382, 13858, 19630, 24764, 25519, 27716, 30955, 34645, 39260, 51038, 61910, 69290, 80483, 102076, 123820, 127595, 138580, 160966, 255190, 321932, 402415, 510380, 804830, 1046279, 1609660, 2092558, 4185116, 5231395, 10462790, 20925580]

約数ペア:

[(1, 20925580), (2, 10462790), (4, 5231395), (5, 4185116), (10, 2092558), (13, 1609660), (20, 1046279), (26, 804830), (41, 510380), (52, 402415), (65, 321932), (82, 255190), (130, 160966), (151, 138580), (164, 127595), (169, 123820), (205, 102076), (260, 80483), (302, 69290), (338, 61910), (410, 51038), (533, 39260), (604, 34645), (676, 30955), (755, 27716), (820, 25519), (845, 24764), (1066, 19630), (1510, 13858), (1690, 12382), (1963, 10660), (2132, 9815), (2665, 7852), (3020, 6929), (3380, 6191), (3926, 5330)]