20784400

素因数分解:

$2^4\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{571}}^1$

素因数の和:609

約数の個数: 120

約数和(自身を含む): 61565504

約数和(自身を除く): 40781104

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 25, 26, 28, 35, 40, 50, 52, 56, 65, 70, 80, 91, 100, 104, 112, 130, 140, 175, 182, 200, 208, 260, 280, 325, 350, 364, 400, 455, 520, 560, 571, 650, 700, 728, 910, 1040, 1142, 1300, 1400, 1456, 1820, 2275, 2284, 2600, 2800, 2855, 3640, 3997, 4550, 4568, 5200, 5710, 7280, 7423, 7994, 9100, 9136, 11420, 14275, 14846, 15988, 18200, 19985, 22840, 28550, 29692, 31976, 36400, 37115, 39970, 45680, 51961, 57100, 59384, 63952, 74230, 79940, 99925, 103922, 114200, 118768, 148460, 159880, 185575, 199850, 207844, 228400, 259805, 296920, 319760, 371150, 399700, 415688, 519610, 593840, 742300, 799400, 831376, 1039220, 1299025, 1484600, 1598800, 2078440, 2598050, 2969200, 4156880, 5196100, 10392200, 20784400]

約数ペア:

[(1, 20784400), (2, 10392200), (4, 5196100), (5, 4156880), (7, 2969200), (8, 2598050), (10, 2078440), (13, 1598800), (14, 1484600), (16, 1299025), (20, 1039220), (25, 831376), (26, 799400), (28, 742300), (35, 593840), (40, 519610), (50, 415688), (52, 399700), (56, 371150), (65, 319760), (70, 296920), (80, 259805), (91, 228400), (100, 207844), (104, 199850), (112, 185575), (130, 159880), (140, 148460), (175, 118768), (182, 114200), (200, 103922), (208, 99925), (260, 79940), (280, 74230), (325, 63952), (350, 59384), (364, 57100), (400, 51961), (455, 45680), (520, 39970), (560, 37115), (571, 36400), (650, 31976), (700, 29692), (728, 28550), (910, 22840), (1040, 19985), (1142, 18200), (1300, 15988), (1400, 14846), (1456, 14275), (1820, 11420), (2275, 9136), (2284, 9100), (2600, 7994), (2800, 7423), (2855, 7280), (3640, 5710), (3997, 5200), (4550, 4568)]