19951880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:139

約数の個数: 128

約数和(自身を含む): 53434080

約数和(自身を除く): 33482200

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 37, 40, 52, 61, 65, 68, 74, 85, 104, 122, 130, 136, 148, 170, 185, 221, 244, 260, 296, 305, 340, 370, 442, 481, 488, 520, 610, 629, 680, 740, 793, 884, 962, 1037, 1105, 1220, 1258, 1480, 1586, 1768, 1924, 2074, 2210, 2257, 2405, 2440, 2516, 3145, 3172, 3848, 3965, 4148, 4420, 4514, 4810, 5032, 5185, 6290, 6344, 7930, 8177, 8296, 8840, 9028, 9620, 10370, 11285, 12580, 13481, 15860, 16354, 18056, 19240, 20740, 22570, 25160, 26962, 29341, 31720, 32708, 38369, 40885, 41480, 45140, 53924, 58682, 65416, 67405, 76738, 81770, 90280, 107848, 117364, 134810, 146705, 153476, 163540, 191845, 234728, 269620, 293410, 306952, 327080, 383690, 498797, 539240, 586820, 767380, 997594, 1173640, 1534760, 1995188, 2493985, 3990376, 4987970, 9975940, 19951880]

約数ペア:

[(1, 19951880), (2, 9975940), (4, 4987970), (5, 3990376), (8, 2493985), (10, 1995188), (13, 1534760), (17, 1173640), (20, 997594), (26, 767380), (34, 586820), (37, 539240), (40, 498797), (52, 383690), (61, 327080), (65, 306952), (68, 293410), (74, 269620), (85, 234728), (104, 191845), (122, 163540), (130, 153476), (136, 146705), (148, 134810), (170, 117364), (185, 107848), (221, 90280), (244, 81770), (260, 76738), (296, 67405), (305, 65416), (340, 58682), (370, 53924), (442, 45140), (481, 41480), (488, 40885), (520, 38369), (610, 32708), (629, 31720), (680, 29341), (740, 26962), (793, 25160), (884, 22570), (962, 20740), (1037, 19240), (1105, 18056), (1220, 16354), (1258, 15860), (1480, 13481), (1586, 12580), (1768, 11285), (1924, 10370), (2074, 9620), (2210, 9028), (2257, 8840), (2405, 8296), (2440, 8177), (2516, 7930), (3145, 6344), (3172, 6290), (3848, 5185), (3965, 5032), (4148, 4810), (4420, 4514)]