28115220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{131}}^1$

素因数の和:230

約数の個数: 144

約数和(自身を含む): 93538368

約数和(自身を除く): 65423148

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 73, 84, 98, 105, 131, 140, 146, 147, 196, 210, 219, 245, 262, 292, 294, 365, 393, 420, 438, 490, 511, 524, 588, 655, 730, 735, 786, 876, 917, 980, 1022, 1095, 1310, 1460, 1470, 1533, 1572, 1834, 1965, 2044, 2190, 2555, 2620, 2751, 2940, 3066, 3577, 3668, 3930, 4380, 4585, 5110, 5502, 6132, 6419, 7154, 7665, 7860, 9170, 9563, 10220, 10731, 11004, 12838, 13755, 14308, 15330, 17885, 18340, 19126, 19257, 21462, 25676, 27510, 28689, 30660, 32095, 35770, 38252, 38514, 42924, 47815, 53655, 55020, 57378, 64190, 66941, 71540, 77028, 95630, 96285, 107310, 114756, 128380, 133882, 143445, 191260, 192570, 200823, 214620, 267764, 286890, 334705, 385140, 401646, 468587, 573780, 669410, 803292, 937174, 1004115, 1338820, 1405761, 1874348, 2008230, 2342935, 2811522, 4016460, 4685870, 5623044, 7028805, 9371740, 14057610, 28115220]

約数ペア:

[(1, 28115220), (2, 14057610), (3, 9371740), (4, 7028805), (5, 5623044), (6, 4685870), (7, 4016460), (10, 2811522), (12, 2342935), (14, 2008230), (15, 1874348), (20, 1405761), (21, 1338820), (28, 1004115), (30, 937174), (35, 803292), (42, 669410), (49, 573780), (60, 468587), (70, 401646), (73, 385140), (84, 334705), (98, 286890), (105, 267764), (131, 214620), (140, 200823), (146, 192570), (147, 191260), (196, 143445), (210, 133882), (219, 128380), (245, 114756), (262, 107310), (292, 96285), (294, 95630), (365, 77028), (393, 71540), (420, 66941), (438, 64190), (490, 57378), (511, 55020), (524, 53655), (588, 47815), (655, 42924), (730, 38514), (735, 38252), (786, 35770), (876, 32095), (917, 30660), (980, 28689), (1022, 27510), (1095, 25676), (1310, 21462), (1460, 19257), (1470, 19126), (1533, 18340), (1572, 17885), (1834, 15330), (1965, 14308), (2044, 13755), (2190, 12838), (2555, 11004), (2620, 10731), (2751, 10220), (2940, 9563), (3066, 9170), (3577, 7860), (3668, 7665), (3930, 7154), (4380, 6419), (4585, 6132), (5110, 5502)]