21485640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{397}}^1$

素因数の和:463

約数の個数: 128

約数和(自身を含む): 72213120

約数和(自身を除く): 50727480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 41, 44, 55, 60, 66, 82, 88, 110, 120, 123, 132, 164, 165, 205, 220, 246, 264, 328, 330, 397, 410, 440, 451, 492, 615, 660, 794, 820, 902, 984, 1191, 1230, 1320, 1353, 1588, 1640, 1804, 1985, 2255, 2382, 2460, 2706, 3176, 3608, 3970, 4367, 4510, 4764, 4920, 5412, 5955, 6765, 7940, 8734, 9020, 9528, 10824, 11910, 13101, 13530, 15880, 16277, 17468, 18040, 21835, 23820, 26202, 27060, 32554, 34936, 43670, 47640, 48831, 52404, 54120, 65108, 65505, 81385, 87340, 97662, 104808, 130216, 131010, 162770, 174680, 179047, 195324, 244155, 262020, 325540, 358094, 390648, 488310, 524040, 537141, 651080, 716188, 895235, 976620, 1074282, 1432376, 1790470, 1953240, 2148564, 2685705, 3580940, 4297128, 5371410, 7161880, 10742820, 21485640]

約数ペア:

[(1, 21485640), (2, 10742820), (3, 7161880), (4, 5371410), (5, 4297128), (6, 3580940), (8, 2685705), (10, 2148564), (11, 1953240), (12, 1790470), (15, 1432376), (20, 1074282), (22, 976620), (24, 895235), (30, 716188), (33, 651080), (40, 537141), (41, 524040), (44, 488310), (55, 390648), (60, 358094), (66, 325540), (82, 262020), (88, 244155), (110, 195324), (120, 179047), (123, 174680), (132, 162770), (164, 131010), (165, 130216), (205, 104808), (220, 97662), (246, 87340), (264, 81385), (328, 65505), (330, 65108), (397, 54120), (410, 52404), (440, 48831), (451, 47640), (492, 43670), (615, 34936), (660, 32554), (794, 27060), (820, 26202), (902, 23820), (984, 21835), (1191, 18040), (1230, 17468), (1320, 16277), (1353, 15880), (1588, 13530), (1640, 13101), (1804, 11910), (1985, 10824), (2255, 9528), (2382, 9020), (2460, 8734), (2706, 7940), (3176, 6765), (3608, 5955), (3970, 5412), (4367, 4920), (4510, 4764)]