21512016

素因数分解:

$2^4\times 3^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:185

約数の個数: 120

約数和(自身を含む): 63964160

約数和(自身を除く): 42452144

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 31, 36, 48, 61, 62, 72, 79, 93, 122, 124, 144, 158, 183, 186, 237, 244, 248, 279, 316, 366, 372, 474, 488, 496, 549, 558, 632, 711, 732, 744, 948, 976, 1098, 1116, 1264, 1422, 1464, 1488, 1891, 1896, 2196, 2232, 2449, 2844, 2928, 3782, 3792, 4392, 4464, 4819, 4898, 5673, 5688, 7347, 7564, 8784, 9638, 9796, 11346, 11376, 14457, 14694, 15128, 17019, 19276, 19592, 22041, 22692, 28914, 29388, 30256, 34038, 38552, 39184, 43371, 44082, 45384, 57828, 58776, 68076, 77104, 86742, 88164, 90768, 115656, 117552, 136152, 149389, 173484, 176328, 231312, 272304, 298778, 346968, 352656, 448167, 597556, 693936, 896334, 1195112, 1344501, 1792668, 2390224, 2689002, 3585336, 5378004, 7170672, 10756008, 21512016]

約数ペア:

[(1, 21512016), (2, 10756008), (3, 7170672), (4, 5378004), (6, 3585336), (8, 2689002), (9, 2390224), (12, 1792668), (16, 1344501), (18, 1195112), (24, 896334), (31, 693936), (36, 597556), (48, 448167), (61, 352656), (62, 346968), (72, 298778), (79, 272304), (93, 231312), (122, 176328), (124, 173484), (144, 149389), (158, 136152), (183, 117552), (186, 115656), (237, 90768), (244, 88164), (248, 86742), (279, 77104), (316, 68076), (366, 58776), (372, 57828), (474, 45384), (488, 44082), (496, 43371), (549, 39184), (558, 38552), (632, 34038), (711, 30256), (732, 29388), (744, 28914), (948, 22692), (976, 22041), (1098, 19592), (1116, 19276), (1264, 17019), (1422, 15128), (1464, 14694), (1488, 14457), (1891, 11376), (1896, 11346), (2196, 9796), (2232, 9638), (2449, 8784), (2844, 7564), (2928, 7347), (3782, 5688), (3792, 5673), (4392, 4898), (4464, 4819)]