19997874

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{467}}^1$

素因数の和:552

約数の個数: 64

約数和(自身を含む): 48746880

約数和(自身を除く): 28749006

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 54, 61, 78, 117, 122, 183, 234, 351, 366, 467, 549, 702, 793, 934, 1098, 1401, 1586, 1647, 2379, 2802, 3294, 4203, 4758, 6071, 7137, 8406, 12142, 12609, 14274, 18213, 21411, 25218, 28487, 36426, 42822, 54639, 56974, 85461, 109278, 163917, 170922, 256383, 327834, 370331, 512766, 740662, 769149, 1110993, 1538298, 2221986, 3332979, 6665958, 9998937, 19997874]

約数ペア:

[(1, 19997874), (2, 9998937), (3, 6665958), (6, 3332979), (9, 2221986), (13, 1538298), (18, 1110993), (26, 769149), (27, 740662), (39, 512766), (54, 370331), (61, 327834), (78, 256383), (117, 170922), (122, 163917), (183, 109278), (234, 85461), (351, 56974), (366, 54639), (467, 42822), (549, 36426), (702, 28487), (793, 25218), (934, 21411), (1098, 18213), (1401, 14274), (1586, 12609), (1647, 12142), (2379, 8406), (2802, 7137), (3294, 6071), (4203, 4758)]