20995380

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{877}}^1$

素因数の和:918

約数の個数: 144

約数和(自身を含む): 76702080

約数和(自身を除く): 55706700

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 19, 20, 21, 28, 30, 35, 36, 38, 42, 45, 57, 60, 63, 70, 76, 84, 90, 95, 105, 114, 126, 133, 140, 171, 180, 190, 210, 228, 252, 266, 285, 315, 342, 380, 399, 420, 532, 570, 630, 665, 684, 798, 855, 877, 1140, 1197, 1260, 1330, 1596, 1710, 1754, 1995, 2394, 2631, 2660, 3420, 3508, 3990, 4385, 4788, 5262, 5985, 6139, 7893, 7980, 8770, 10524, 11970, 12278, 13155, 15786, 16663, 17540, 18417, 23940, 24556, 26310, 30695, 31572, 33326, 36834, 39465, 49989, 52620, 55251, 61390, 66652, 73668, 78930, 83315, 92085, 99978, 110502, 116641, 122780, 149967, 157860, 166630, 184170, 199956, 221004, 233282, 249945, 276255, 299934, 333260, 349923, 368340, 466564, 499890, 552510, 583205, 599868, 699846, 749835, 999780, 1049769, 1105020, 1166410, 1399692, 1499670, 1749615, 2099538, 2332820, 2999340, 3499230, 4199076, 5248845, 6998460, 10497690, 20995380]

約数ペア:

[(1, 20995380), (2, 10497690), (3, 6998460), (4, 5248845), (5, 4199076), (6, 3499230), (7, 2999340), (9, 2332820), (10, 2099538), (12, 1749615), (14, 1499670), (15, 1399692), (18, 1166410), (19, 1105020), (20, 1049769), (21, 999780), (28, 749835), (30, 699846), (35, 599868), (36, 583205), (38, 552510), (42, 499890), (45, 466564), (57, 368340), (60, 349923), (63, 333260), (70, 299934), (76, 276255), (84, 249945), (90, 233282), (95, 221004), (105, 199956), (114, 184170), (126, 166630), (133, 157860), (140, 149967), (171, 122780), (180, 116641), (190, 110502), (210, 99978), (228, 92085), (252, 83315), (266, 78930), (285, 73668), (315, 66652), (342, 61390), (380, 55251), (399, 52620), (420, 49989), (532, 39465), (570, 36834), (630, 33326), (665, 31572), (684, 30695), (798, 26310), (855, 24556), (877, 23940), (1140, 18417), (1197, 17540), (1260, 16663), (1330, 15786), (1596, 13155), (1710, 12278), (1754, 11970), (1995, 10524), (2394, 8770), (2631, 7980), (2660, 7893), (3420, 6139), (3508, 5985), (3990, 5262), (4385, 4788)]