21074820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{659}}^1$

素因数の和:725

約数の個数: 96

約数和(自身を含む): 65197440

約数和(自身を除く): 44122620

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 41, 52, 60, 65, 78, 82, 123, 130, 156, 164, 195, 205, 246, 260, 390, 410, 492, 533, 615, 659, 780, 820, 1066, 1230, 1318, 1599, 1977, 2132, 2460, 2636, 2665, 3198, 3295, 3954, 5330, 6396, 6590, 7908, 7995, 8567, 9885, 10660, 13180, 15990, 17134, 19770, 25701, 27019, 31980, 34268, 39540, 42835, 51402, 54038, 81057, 85670, 102804, 108076, 128505, 135095, 162114, 171340, 257010, 270190, 324228, 351247, 405285, 514020, 540380, 702494, 810570, 1053741, 1404988, 1621140, 1756235, 2107482, 3512470, 4214964, 5268705, 7024940, 10537410, 21074820]

約数ペア:

[(1, 21074820), (2, 10537410), (3, 7024940), (4, 5268705), (5, 4214964), (6, 3512470), (10, 2107482), (12, 1756235), (13, 1621140), (15, 1404988), (20, 1053741), (26, 810570), (30, 702494), (39, 540380), (41, 514020), (52, 405285), (60, 351247), (65, 324228), (78, 270190), (82, 257010), (123, 171340), (130, 162114), (156, 135095), (164, 128505), (195, 108076), (205, 102804), (246, 85670), (260, 81057), (390, 54038), (410, 51402), (492, 42835), (533, 39540), (615, 34268), (659, 31980), (780, 27019), (820, 25701), (1066, 19770), (1230, 17134), (1318, 15990), (1599, 13180), (1977, 10660), (2132, 9885), (2460, 8567), (2636, 7995), (2665, 7908), (3198, 6590), (3295, 6396), (3954, 5330)]