19778720

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{257}}^1$

素因数の和:322

約数の個数: 96

約数和(自身を含む): 51882768

約数和(自身を除く): 32104048

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 37, 40, 52, 65, 74, 80, 104, 130, 148, 160, 185, 208, 257, 260, 296, 370, 416, 481, 514, 520, 592, 740, 962, 1028, 1040, 1184, 1285, 1480, 1924, 2056, 2080, 2405, 2570, 2960, 3341, 3848, 4112, 4810, 5140, 5920, 6682, 7696, 8224, 9509, 9620, 10280, 13364, 15392, 16705, 19018, 19240, 20560, 26728, 33410, 38036, 38480, 41120, 47545, 53456, 66820, 76072, 76960, 95090, 106912, 123617, 133640, 152144, 190180, 247234, 267280, 304288, 380360, 494468, 534560, 618085, 760720, 988936, 1236170, 1521440, 1977872, 2472340, 3955744, 4944680, 9889360, 19778720]

約数ペア:

[(1, 19778720), (2, 9889360), (4, 4944680), (5, 3955744), (8, 2472340), (10, 1977872), (13, 1521440), (16, 1236170), (20, 988936), (26, 760720), (32, 618085), (37, 534560), (40, 494468), (52, 380360), (65, 304288), (74, 267280), (80, 247234), (104, 190180), (130, 152144), (148, 133640), (160, 123617), (185, 106912), (208, 95090), (257, 76960), (260, 76072), (296, 66820), (370, 53456), (416, 47545), (481, 41120), (514, 38480), (520, 38036), (592, 33410), (740, 26728), (962, 20560), (1028, 19240), (1040, 19018), (1184, 16705), (1285, 15392), (1480, 13364), (1924, 10280), (2056, 9620), (2080, 9509), (2405, 8224), (2570, 7696), (2960, 6682), (3341, 5920), (3848, 5140), (4112, 4810)]