20903480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{659}}^1$

素因数の和:744

約数の個数: 64

約数和(自身を含む): 51559200

約数和(自身を除く): 30655720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 61, 65, 104, 122, 130, 244, 260, 305, 488, 520, 610, 659, 793, 1220, 1318, 1586, 2440, 2636, 3172, 3295, 3965, 5272, 6344, 6590, 7930, 8567, 13180, 15860, 17134, 26360, 31720, 34268, 40199, 42835, 68536, 80398, 85670, 160796, 171340, 200995, 321592, 342680, 401990, 522587, 803980, 1045174, 1607960, 2090348, 2612935, 4180696, 5225870, 10451740, 20903480]

約数ペア:

[(1, 20903480), (2, 10451740), (4, 5225870), (5, 4180696), (8, 2612935), (10, 2090348), (13, 1607960), (20, 1045174), (26, 803980), (40, 522587), (52, 401990), (61, 342680), (65, 321592), (104, 200995), (122, 171340), (130, 160796), (244, 85670), (260, 80398), (305, 68536), (488, 42835), (520, 40199), (610, 34268), (659, 31720), (793, 26360), (1220, 17134), (1318, 15860), (1586, 13180), (2440, 8567), (2636, 7930), (3172, 6590), (3295, 6344), (3965, 5272)]