20898540

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{229}}^1$

素因数の和:273

約数の個数: 144

約数和(自身を含む): 70711200

約数和(自身を除く): 49812660

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 27, 30, 36, 39, 45, 52, 54, 60, 65, 78, 90, 108, 117, 130, 135, 156, 169, 180, 195, 229, 234, 260, 270, 338, 351, 390, 458, 468, 507, 540, 585, 676, 687, 702, 780, 845, 916, 1014, 1145, 1170, 1374, 1404, 1521, 1690, 1755, 2028, 2061, 2290, 2340, 2535, 2748, 2977, 3042, 3380, 3435, 3510, 4122, 4563, 4580, 5070, 5954, 6084, 6183, 6870, 7020, 7605, 8244, 8931, 9126, 10140, 10305, 11908, 12366, 13740, 14885, 15210, 17862, 18252, 20610, 22815, 24732, 26793, 29770, 30420, 30915, 35724, 38701, 41220, 44655, 45630, 53586, 59540, 61830, 77402, 80379, 89310, 91260, 107172, 116103, 123660, 133965, 154804, 160758, 178620, 193505, 232206, 267930, 321516, 348309, 387010, 401895, 464412, 535860, 580515, 696618, 774020, 803790, 1044927, 1161030, 1393236, 1607580, 1741545, 2089854, 2322060, 3483090, 4179708, 5224635, 6966180, 10449270, 20898540]

約数ペア:

[(1, 20898540), (2, 10449270), (3, 6966180), (4, 5224635), (5, 4179708), (6, 3483090), (9, 2322060), (10, 2089854), (12, 1741545), (13, 1607580), (15, 1393236), (18, 1161030), (20, 1044927), (26, 803790), (27, 774020), (30, 696618), (36, 580515), (39, 535860), (45, 464412), (52, 401895), (54, 387010), (60, 348309), (65, 321516), (78, 267930), (90, 232206), (108, 193505), (117, 178620), (130, 160758), (135, 154804), (156, 133965), (169, 123660), (180, 116103), (195, 107172), (229, 91260), (234, 89310), (260, 80379), (270, 77402), (338, 61830), (351, 59540), (390, 53586), (458, 45630), (468, 44655), (507, 41220), (540, 38701), (585, 35724), (676, 30915), (687, 30420), (702, 29770), (780, 26793), (845, 24732), (916, 22815), (1014, 20610), (1145, 18252), (1170, 17862), (1374, 15210), (1404, 14885), (1521, 13740), (1690, 12366), (1755, 11908), (2028, 10305), (2061, 10140), (2290, 9126), (2340, 8931), (2535, 8244), (2748, 7605), (2977, 7020), (3042, 6870), (3380, 6183), (3435, 6084), (3510, 5954), (4122, 5070), (4563, 4580)]