21208480

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:170

約数の個数: 96

約数和(自身を含む): 53152848

約数和(自身を除く): 31944368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 53, 61, 80, 82, 106, 122, 160, 164, 205, 212, 244, 265, 305, 328, 410, 424, 488, 530, 610, 656, 820, 848, 976, 1060, 1220, 1312, 1640, 1696, 1952, 2120, 2173, 2440, 2501, 3233, 3280, 4240, 4346, 4880, 5002, 6466, 6560, 8480, 8692, 9760, 10004, 10865, 12505, 12932, 16165, 17384, 20008, 21730, 25010, 25864, 32330, 34768, 40016, 43460, 50020, 51728, 64660, 69536, 80032, 86920, 100040, 103456, 129320, 132553, 173840, 200080, 258640, 265106, 347680, 400160, 517280, 530212, 662765, 1060424, 1325530, 2120848, 2651060, 4241696, 5302120, 10604240, 21208480]

約数ペア:

[(1, 21208480), (2, 10604240), (4, 5302120), (5, 4241696), (8, 2651060), (10, 2120848), (16, 1325530), (20, 1060424), (32, 662765), (40, 530212), (41, 517280), (53, 400160), (61, 347680), (80, 265106), (82, 258640), (106, 200080), (122, 173840), (160, 132553), (164, 129320), (205, 103456), (212, 100040), (244, 86920), (265, 80032), (305, 69536), (328, 64660), (410, 51728), (424, 50020), (488, 43460), (530, 40016), (610, 34768), (656, 32330), (820, 25864), (848, 25010), (976, 21730), (1060, 20008), (1220, 17384), (1312, 16165), (1640, 12932), (1696, 12505), (1952, 10865), (2120, 10004), (2173, 9760), (2440, 8692), (2501, 8480), (3233, 6560), (3280, 6466), (4240, 5002), (4346, 4880)]